Duplicating apparatus.



A. B. DICK. DUPLIGATING APPARATUS,

APPLICATION FILED SEPT. 24,1907.

Patented v. 10, 1908.

2 SHEBTSSHEET 1.

- 5,. B.. NGK.-

DUPLIGATING APPARATUSA APPLIOATIONl FILED SEPT. 24, 1907.

Patnsed NW10, 1908.

2 SHEETS-SHEET 2y |NVENTUR BY -ATTORNEY retiren cierren.

ALBERT B. DCK, OF LAKE FOREST, ILLTNOIS, ASSIGNOR TO A. B. DICK COMPANY, OF

' CHICAGO, TLLINOTS, A CORPORATION OF ILLINOIS.

nniemcnfrrne Preserve No. goalie?.

Speci'cetionrof 'Lettere atent.

Patented Nov. 10, 1908.

Application filed September 24, 1907, Serial. No. 894,302.

'atus, of which the following is a specification.

This invention relates to duplicating apparatus and refers more particularly to the combination of sheet-feeding devices and duplicating mechanism forming an appz ratus which is capable of efficient and ,reliable operation, which may be run' at coinparatively high speed, and with which superior results are obtained. i

'lhe ini` ulti nection with duplicating mechanism of various types, as, for instance, those printing i'ron'rtype-iorms which either reci procatc or rotate, but it is particularly Well adapted for use with stencil-duplicating machines employing a` drum having the stencil secured thereon and a pressure-roller coacting there with. I

lnv all duplicating machines, and especially in`stencil-duplicators, arranged to deposit the sheets, after they have been imprinted upon, one on top of another, ink on one sheet is apt to he transferred to the back of the overlying sheet and thc impression on the under sheet is apt to become blurred. For this reason, the expedient of `interleaving sheets between the impression-sheets has been employed, this being done either by hand or by depositing an interleaving sheet on top of each impression-sheet after the latterlreachcs the delivery-tray.

Tn accordance with my invention, tWo sheets, one an interleaving sheet and the other an impression-sheet, are fed simultaneously to the duplicating mechanism, one on top ot the other, and the impressionsheet is imprinted upon and the two sheets ted out of the untrhine to the delivorydray simultaneously. Two sheet-feedil'ig devices are employed. one for the interleaving sheets and the other for the impression-sheets, and thesel operate in unison with each other and ,with the printing devices, so that an impression-sheet and an ii-iterleaving sheet are fed together to the printing devices for each operation of the latter. ln this Way, there' is an interleaving directly under each w a may he employed in con.

impressionLsheet in the delivery-tray, and blurring of the impressions and soiling the hacks o the impression-sheets are etiectually prevented.

The preferred embodiment of the invention is illustrated in the accompanying drawings, in which Figure l is a plan View of the machine with certain of the parts broken away; Fig. 2 is a central section thereof; and Figs. 3 and L are detail views hereinafter referred Referring to these drawings, A indicates the base of the machine, upon which is supported a suitable frame, comprising, usually,

side-members B, between yWhich 1s pivotcd upon. the stub-shafts c thestencil-carrying drum C upon the periphery of which the stencil-sheet is stretched. Directly underlying the stencil-carrying drum and operated by peripheral contact therewith or with the intervening impression-sheet, is the pressureroller D, here shown as journaled at d upon arms Ehinged at c to the side-'members of the tranne. 'Springs F tend to exert upward pressure upon the pressure-roller. Cams mounted upon a shaft j, actuated by a suitable hand-piece outside the frame of the machine, serve to move the pressure-roller D to operative or inoperative position, the latter of which positions is illustrated in Fig. 2.

The stencil-carrying drum C is rotated in any suitable manner, as, for instance, hy a handle connected or geared to one ot' the stuhshats c. The Stuhshaft 'c on thc opposite side oi' the machine carries a gear' c'l which forms one of a train of gears c2 connecting the stencil-carrying drum to a gear c mounted on a suitable stubshatt on one of the frames B. Each of the gears of this train is mounted for rotation on a stub-shaft secured on the 'frame B, as llustrated in Fig. 1. Secured to the gear c", are a. locking-plate ft and a mutilated gcarh'lountedfor rotation iii suitable hearings 'formed in the iframes B, is a shaft g having a stop-roll G loosely mounted thereon and connected thereto by a clutch g arranged to permit rotation of roll G in one direction t'ree or" shaft g but connect the -shaft in driving relation to the roll when the former is assi' .ai/'aimera Acori" toward and awa trom eaeh other. Thetorwardiug-roller li turns freely in its bearings, actuated by the belts lurniug' now io the sheet-l'eedingt appatus' 'l'or the inq )ressionfsheets, li imlicates t a tray l'or the pile ot' impression-sheets, hai'- meshes with an idleraliinion /l, which meshes Q witl a pinion /z/-sernred upon one end ot a shaft //2 which is mounted. for rotation in bearings t'oruied in the iframes l. Hha'lt /z2 ea'rries a sheet-feeding roll Il, wlneh is loose on the shaft but adapted to be connected thereto l .j a clutch /15 similar to the, eluteh y.

The roll (i has a shallow peripheral groove euttherein. Directly underlyingthis roll is a bar .l extendingbetween the side-trames and haring' a vertical opening` therein to receive a pin i, the lower end ot' which is threaded and enters a opening' in a gear 1f mounted for rotation between the bar l and a support depending' theret'rom. On the' upper end o'l'f the pin z' is a block eairyirm' a stolji-plate '17". Suit'- ahle means are provided for rotatingr the I vear i. so as to 'aise or lower the pin fi, block and stop-plate i, and thus cause the end ot" the .stop 27' to enter more or less into the lgroove in the roll. (l.

J indicates a` tray adapted to supporti a pile of interleaving sheets. This tray is formed oli slieet-inetal and is piif'otally mounted npoirstuds extending inwardly7 from the ends of the trames B. At its outer end the tray'J has a. weight y" adjustably mounted upon the under side thereo't'. This yWeight serves to rock the tray on its pivot in the direction to raise the opposite end ot the tray and thus press the pile of sheets up- Wardly into contact withv the surface of theV sheet-feeding roll H. The provision of the adjustment of the weight toward and away 'fromvthe pirots ot the tray permits of adjusting' the pressure of the sheet pile against the sheet-feeding roll.

K and K indicate sheetft'orwarding rollers, on which a pln'ality.ot belts are adapted to run.V The rol-ler K is mounted on shaft 7u', one end ot which extended through its bearine' in the sidet`ra1ne B and carries a pinion ,meshingl with an idlerpinion 7.1"" which meshes with the gear c (Fig. El). A sheet-forwarding roller 7a4 is mounted for rotation in bearings formed in the ends of arms if' `Which are pivotally mounted on stub-shat-is 1 extending inwardly from the frames B, and springs la? are provided on these stub-shafts and arranged to act-nate the arms 1 to press the roller la" di'nvnwardly upon the surface. of the belts r running' on the'forwarding-roller l'. ltlorable guides lf* are provided lor co acting with. the lateral edges oit the sheetsas they are l'orwardnal by the belts, these guides being threaded ing' adjustable `guides l atits sides. tray is ol' sheet-metal and at its Jinfward edge hasy downwardly turned ears l with openings therethrough adapted to receive pins earried by the side-trames l.- The opposite end ot the tray rests upon stationary pins Z2 extending' inwardly from the trames The t'ort'ard (alge of the tray L lies close to the torwarding-roller K; beyond" this rolleiI and between it and the-drnm C, isa plate Z haring' a slot eut therein.,

Ml and X indieate sheet-feeding rollers which are operated intermittently to steed toi-ward to the drum C an impression-sheet passed thereto :trom the tray L. 'lfheserollers are preferably ot sectional forni'.y one 'or both ot them being ot" rubber. l also employ. preferably, a sheet-guide l, here shown as' seeured to the trames .B and arranged ob- .liquely to iliorm a wedge-shaped opening into which the sheets may be passed to the rollers ai, N. This sheet-guide isbere shown'as prorided witlrtingers r coextensiye in size with the sections ot the feed-roller M and terminating immediately7 below or slightly reaiwaiy'l of those sections. The roller X op crates in the slot formed in the plate Z3, its upper surface being flush with or slightly above the surface of the plate. The roller V is loose on its shaft, but is adapted to be conneeted thereto by a clutch m similar to the elutch gi. This roller carries a pinion mi which meshes with a, pinion n on the shaft of the lower roller N. At the end of the shaft m adjacent clutch m, is secured'a pinion m, which meshes with a pinion o mount-ed for rotation on a stub-shaft extending inwardly from the frame B. Secured to this pinion is aroller o', the surface of which is covered with a yielding` material, such as leather,.felt or rubber. The-roller o is adapted to be actuated by a portion of the'4 duplicating mechanism, so that .the sheet-feedingrollers M and N will operate in unison with this mechanism. For this purpose, I have shown the feed-roll-actuating device as carried vby the drum' C. 'f-Ihis.'l devies comprises-'a sector O pivotedipnf-qlfe et' the stubshafts c "and having a serrated edge ,(see'FiO. 4) adapted to coactl withv the surface vo-the roller Q. This set'o O is provided with an elongated slot o?, throu h which extends 'a screw 03, the end of. which is received in a suitably threaded'orifce in the adjacent head of the drum. Suitable. stripping devices are providedfor'preventing the sheets from beilrpor carried'- around with the drinn C,`but since these torni no part of my present `in arranged to shift the end belts l \'ention they will nottbe described in detail. .131i

eea/ier After the impression sheets havebeen inrprinted upon and the two sheets fed simultaneously from the drinn, the sheets fall together ina suitable delivery-tray, indicated at l.

ln the operation of the machine, a pile of interleaving sheets is placed upon the tray J and moved forwardly thereon between the side-guides carried by the tray until Athe forward edge of the pile abuts against the stopplate z'. The weight j is then adjusted s0 that the pile of sheets at its forward edge is pressed upwardly against the under surface Aof the sheet-separating roll H with the desired degree 'of pressure. A pile of impression-sheetsis then placed upon the tray L. rlhe stencil having been secured upon the periphery of the drum C in the usual manner, the operation of the machine Vis begun. As the drum C rotates, the feed-rollers M and N are intermittently actuated by the coaction of the edge of sector (l with the roller o', driving the feed-rollers through the gearing o, m. mit and in Also, the forwarding-rollers K. li and la* and the belts and the stoproll G are continuously rotated by the gear c I and the sheetsseparating roll ll is intermittently rotated by means of the gearing c, gt, le. and li. llr'hen the sheet-separating roll ll is rotated, the topmost sheet of the pile on the tray .l ismovcd fowardly between the stopplate v' and the stop-roll G to the forwarding-rollers K. Zd. The position of the stop-` plate i?" relativclyto the stop-roll (lr may be delicately adjusted to preclude the passage of more than one sheet between these parts.- lletore the rotation of the sheet-feeding roll ll is discontinued. the edge of the sheet is grasped between the forwardiiig-rollers K and and the sheet is' forwarded by these rollers and the belts to the drinn C. ,is thisI interleavii'ig sheet is movingforwardly upon the belts' the operator grasps the rear li and lpasses vthe sheet forwardly until its forward edge enters between the sheetfeeding rollers M and N. As the drum (l continues its rotation, the edge of the sector (l engages the roller o and operates to rotate the rollers M and N.. rlhe rotation of these rollers' preferably begins just as the forward edge of the interleaveing sheet reaches them and the forward edge of the impressioirshcet from the ltray li is grasped between these rollers and t'ed forwardly tothe drum C, together with the interleaving sheet directly underlying the impression-sheet. .lifter the forward edges of the two sheets have passed beyond the pressure-roller D, the latter is raised to operative position by the springs F and the two sheets are grasped between the pressure-roller D and the drum C, this talring place before the positive operation of the feed-rollers M and N has been discontinued, duc to the passage of the end of theiscctor 0 loc of the topmost sheet of the pile on the beyond the roller o. The im tension-sheet is then imprinted upon and the 'wo sheets fed out of the machine simultaneously in the usual manner, the feed-rollers M and N turning freely to permit this. ln the delivery-tray l, there 1s an interleaving sheet directly Y I adjacent to the line of coaction of the drum and pressure-roller, two supports for sheet piles lo lated in cooperative relation to Said device and. from which sheets may be fedi simultaneously to said device, means for 0perating said sheet-feeding device intiermlttently in correspondence with the rotation of said drum, and means for edectin'gaiiradjnstinent of the time of operation koffsaid s l1eet-feeding `device with respect to the 1'0- tation of said drum, substantially as set forth.

2. ln a printing mechanism, .the combi-nation of a. drum, a stencil secured to the periphery thereof, a pressure-roller adjacent to the drum, a sheet-feeding device mounted adjacent to the line of coaction of the drum and pressure-roller, two supports for sheet piles located in coperative relation to said sheet-feeding device and from which sheets may be fed simultaneously to said device,

and a part adj nstably mounted ori said drum and adapted to operate said asheet-feeding device intermittently .to feed said sheets between the drum and pressure-roller, substantiallyas set forth.

3. ln a printing mechanism, the co1nbination of a drum, a` stencil secured to the periphery thereof, a pressure-roller adjacent to the drum, a pair of sheet-feeding rolls mounted adjacent to the line of eoaction of said drum and pressure-roller, two feedboards located in cooperative relation to saidv rolls and from which sheets may be fed simultaneously to said rolls, and a part ad! justably mounted on said drum and adapted-,-

'to rotate said rolls intermittently to feed said` sheets between the drum and pressureroller, substantially as set forth.

4.. In a printingmechanism, the combination of a drum, :1h-.metten secured. to the periphery thereof, a pressure-roller adjacent to the drum, a pair of sheet-feeding rolls mounted adjacent to the line of coaction of said drum and pressure-miller, an automatic sheet-feeding device for feeding sheets successively to said rolls, a. feed-board located in cooperative relation to said rolls from which sheets may be fed successively to said feed-rolls simultaneously with the sheets fed by said -devicefmeans for rotating said drum, means foroperating said device, and

adpart adjustablymonted on said drum and a apted to rotate said rolls intermittently to j feed yslaidsheets between the drum and pressure-roller, substantially as set' forth.-4

5. In a rinting mechanism, the combination of a rum, a stencil secured to the periphery thereof, a pressure-roller adjacent tol :l the drum, "a 'pair ofV sheet feeding rolls ',l mounted adjacent to the line of coaction of ysaid drum and pressure-'roller,`an automatic sheet-feeding. device for feeding sheets successiv'ely to said rolls, a feed-board mounted l5 above said device with its forward edge ad jacentto said feed-rolls and from which sheets may he fedy successively to said feedrollsl simultaneously with the sheets fed by 'said device, means for operating said drum and said device, means for rotating said feed-rolls intermittently in correspondencefwith the rotation of said drum to feed said sheets between the drum and pressureroller, and means for effecting an adjustment of the time of operation of 'said feed-rolls with lrespect to the rotation of said drum,

` substantially as set forth.

6. n a printing machine, the combination of a drum, a stencil secured to the periphery ofthereof, a pressure-roller adjacent to the 7. The combination of a printing lnechanism comprising a drum, a stencil secured to 4.5 the periphery thereof and a pressure-roller cosas? adjacent to the drum, a support for a sheet pile, means for automatically feeding sheets from said pile, a pair of sheet-feeding rolls, a' single means for rotatin said drum and. operating said sheet-fee ing means, and mea-ns' actuated by said drum for operating said rolls intermittently to feed sheets between the drum and said pressure-roller simultaneously with the sheets fed hy said means, substantially as set forth. y

8. The combination of a printing mechanism comprising a drum, a stencil secured to the periphery thereof and a pressure-roller adjacent to the drum, a support for a sheet pile, means for automatically feeding sheets from said pile, a pair of sheet-feeding rolls lying adjacent to said drum and one above -and the other below the path of movement of the sheets fed by said means, means for operating said drum and said sheetfeeding means, a feed-board adjacent to said rollsfrom which sheets may be fed to theroller additional to the sheets fed by 'said automatic feeding means, and a part rotating with said drum arranged to rotate said rolls intermittently, substantially as set forth.

' 9. The combination of a printing mechanism comprising a drum, a stencil secured to the surface thereof anda pressure-roller adjacent to the drum, a pivoted support for a sheet pile, a separator-roll overlying the end of said support, a stoproller ad] arent to said separator-roll, a stop coacting with and adjustabletoward and away from said stoprol ler, and a single means for continuously rotating said drum and said stop-roller and intermittently rotating said separator-roll, substantially as set forth.

This specification signed and witnessed this 21st day of September, 1907.

ALBERT B. DICK. litncsses V. (i. ARNOLD,

M. H. B'Uxuian'r. 

